| CAPACITIES (BTU'S NAT. GAS) | MINIMUM | MAXIMUM | |||||||
| A | B | C | D | E | WEIGHT | (1") | (2 LBS) | ||
| ER-0 | 3/8" | 3/8" | 5-13/16" | 2-11/16" | 1-5/8" | 1 | 2,400 | 20,500 | |
| ER-1 | 3/8" | 1/2" | 7-3/8" | 2-13/16" | 2-13/16" | 1 | 3,200 | 33,000 | |
| ER-2 | 3/8" | 3/4" | 7-3/4" | 2-13/16" | 2-13/16" | 1-1/2 | 5,200 | 48,400 | |
| ER-3 | 1/2" | 1" | 9-1/16" | 2-13/16" | 2-13/16" | 1-3/4 | 7,100 | 87,400 | |
| ER-4S | 3/8" | 1"-1/4" | 8-3/4" | 2-3/4" | 2-7/8" | 1-1/2 | 13,000 | 149,000 | |
| ER-4 | 3/4" | 1"-1/4" | 11-13/16" | 3-1/2" | 4-1/8 | 3-1/2 | 13,000 | 149,000 | |
| ER-5 | 3/4" | 1"-1/2" | 14" | 3-1/2" | 4-1/8" | 4-1/2 | 22,000 | 249,000 | |
| ER-6 | 1" | 2" | 17-1/2" | 3-11/16" | 4-1/8" | 7 | 35,000 | 431,000 | |
| ER-7 | 1"-1/4" | 2"-1/2" | 22-5/8" | 4-1/8" | 5" | 12 | 56,000 | 657,000 | |